Buttonhole-sewing machine



Patented Oct. l8, I898.

c. A. DAHL. BUTTONHOLE SEWING MACHINE.

[Application filed Feb/1, 1897.)

I8 Sheets-Sheet I.

(No Modl.)

m: NORRIS PEYERS co, vno'rduwo,v wnsumn'rou. u. c.

C. A'. DAHL. BUTTONHOLE SEWING, MACHINE;

(Application filed Feb. 1, 1897.)

No. 6l2 ,604. Patented Oct. I8, I898.

(No Model.)

l8 Sheets-Sheet 2.

YHE nonms PETERS co. l wm'cxuwmvv wranmm'orl. n. c.

No. 6l2,604. Patented Oct. l8, I898.

c. A. DAHL. BUTTONHOLE SEWING MACHINE.

(Application mm Feb. 1. 1897.) (No Model.)

l8 Sheets-Sheet 3.

IT EEEEE a 2 In: Npnms FEYERS co momumo" WASHINGTON n. c.

No. 6l2,604.

Patented Oct. I8, 1893. c. A. DAHL. B'UTTONHDLE SEWING MACHINE;

(Application filed Feb. 1, 1897.)

I8 shaets snw 4.

(No Model.)

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I 62 I I No. 6l2,604. Patented Oct. l8, I898.

c. A. DAHL. BYUTTDNHOLE SEWING MACHINE.

(Application filed Feb. 1, 1897.)

(No Model.) l8 Sheets-Sheet 5.

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JMJOMZJ m: NDRWS PETERS no. wo'rau'mo, wAsumm'ou. u c,

N0. 6|2,6U4. Patented UG't. l3, I898.

C. A. DAHL.

BUTTONHOLE SEWING MACHINE.

(Application filed Feb. 1, 1897.)

l Sheets-Sheet 6.

(No Model.)

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E s /r im WI'I'IJESEIES 2 @MM 4 No. 812,804. Patented Oct. 18,1898.

c. A. DAHL.

BUTTONHULE SEWING MACHINE.

(Application filed Feb. ,1, 1897.)

I8 sheets-$118887.

(No Model.)

WITNESEEE No. 6|2,604. Patented on. IS, I898.

. c. A. DAHL.

BUTTONHOLE SEWING MACHINE.-

(Application filed Feb. 1, 1897.)

{No Model.)

8 Sheets-Sheet 8.

Patented Oct. I8, I898.

W cLA. DAHL. BUTTDNHOLE SEWING MACHINE (Application filed Feb. 1, 1897.)

I8 Sheets-Sheet '9.

(No Model.)

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Patented Oct. I8, [898. C. A. DAHL.

BUTTDNHOLE SEWING MACHINE. (Ayplication filed Feb. 1. 1397. (No Model.)

l8 Sheets-Sheet l0.

WIT E5555 i l TEI w v v w F\ @JWM m: Momus PETERS cc. FHOTO-LITNOJ WAENQNGTGN, a c

No. 6l2,604. Patented 00%. I8, I898.

c. A. DAHL.

BUTTONHOLE SEWING MACHINE.

(Application filed Feb. 1, 1897.)

I8 Sheets-Sheet II.

(No Model.)

WW 2 m Patented Oct. l8, I898. c. A; DAHL. BUTTDNHOLE SEWING MACHINE.

(Applicltinn'fllad Feb. 1, 1887.)

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(No Model.)

WIT EEISEE 4? L/WMVZ No. 6l2,604. Patented Oct. I8, I898.

C. A. DAHL.

BUTTONHOLE SEWING MACHINE;

(Application filed Feb. 1, 1897.) (N o M o d e I.)

I8 Sheets-Sheet l3.

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No. 6I2,604.

lApplicati on filed Feb. 1, 1897.)

(No Model.)

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| I I l I I I I I THE NORRIS PETERS on, vuofauma. wAsmNo'rbw 04 c No. 6|2',e04. Patented Oct. l8, I898.

c. A. DAHL.

BUTTONHOLE SEWING MACHINE.

(Application filed Feb. 1, 1897.) (No Model.) l8 Sheets$heat l5.

No. s|2,eo4. Patented Oct. l8, l898.

c. A. DAHL.

BUTTONHOLE SEWING' MACHINE.

[Application filed Feb. 1, 1897.) Modal-Y) ls Sheets-Sheet 16.

No. 6l2,604. Patented Oct. l8, I898. C. A. DAHL.

BUTTONHOLE SEWING MACHINE.

(Application filed Fab. 1, 1897.)

I8 Sheets-Sheet W.

(No Model.)

,THE NORRIS Pawns cu moTouTwa, wnsnmamm n. c.

N0. 6l2,604. atented Oct. l8, I898.

c. A. DAHL.

BUTTDNHULE SEWING MACHINE.

(Application filed Feb. 1, 1897.)

(No Model.) l8 Sheets-Sheet l8.

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. llN iTED STATES PATENT FFlCEm cHAHLEs A. DAHL, OF LYNN, MASSACHUSETTS, AssieNToR, BY MESNE AS- SIGNMENTS, TO THE CONSOLIDATED SEWING MACHINE COMPANY, oE

PORTLAND, MAINE.

BUTTONHOLE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 612,604, dated October 18, 1898. Application filed February 1, 1897. Serial No. 621,468.' (No model.)

To ctZZ whom it may concern.-

Be it known that I, CHARLES A. DAI-IL, a citizen of the United States, and a resident of Lynn, in the county of Essex and State of Massachusetts, have invented a new and useful Improvement in Buttonhole-Stitching Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The invention relates to a buttonhole stitching and barring machine in which there is organized a clamp for holding the work or material in which the buttonhole is being stitched, which is mounted upon abed and is adapted to hold the work stationary exceptin g during the stitching of the bar end and eye, when it is provided with a slight lateral movement first in one direction and then in a reverse direction from its median line, a traveling buttonhole-cutter and a traveling anvil which is also provided with an additional movement whereby it is brought into operative relation with the material held by the clamp and with the buttonhole-cutter and held in such relation during the cutting operation and then returned to its original position, a frame or support carrying the stitchforming devices and buttonhole-cutting de vices which is provided with an intermittent movement upon a straight line upon its support forward and back, and which presents the stitching devices to the work or material held by the clamp, and which stitching devices are turned or rotated during the stitching of the eye and returned to their original position at the end of the stitching of the but tonhole. There are also organized in the machine instrumentalities for starting the machine upon the movement of the work-clamping lever, for operating the cutting mechanism and the stitching mechanism bya single belt, forautomatically shipping the belt, and for automatically connecting and disconnect ing a loose wheel with the buttonhole-cutteroperating mechanism. The machine also has clamp-spreading mechanism and stitcher-returning devices and means for stitching a barring end of a peculiar character to the buttonholc.

Before I describe the construction of the machine specifically I will further describe the invention generally by giving the opera tion of the machine. The work or material is placed in the buttonholeclamp and the clamping-lever moved to depress the upper members of the clamp upon the material or work, thus clamping it to the lower members thereof and at the same time starting the operationof the cutting mechanism and cutting the buttonhole by the immediate or instantaneous descent of the cutter to the cuttinganvil, which is at the same instant moved forward beneath the material to receive it, the throat, its support, and its operating devices being moved forward at the same time to make place for the anvil. The cutter and anvil are instantly withdrawn and the throat and lower needle restored to their original and operative position and the anvil to its inoperative position, and during the remainder of the operation of machine the cutter and anvil are inoperative. The work-clamp is immediately spread and the stitch-forming devices, which are in their forward position and beyond the rear end of the buttonhole, are set in operation. The work-clamps then hold the material in such position that the first two or three stitches are taken across the material beyond the end of the buttonhole and upon a diagonal advancing line, the work-clamps moving slightly laterally while the stitching-frame is being advanced and until the under needle enters the end of the buttonhole-slit. The work-clamps then hold the material stationary while the stitching devices are advanced along one side of the slit in a straight line to the beginning of the stitching of the eye, when the worlcclamps are again moved laterally, first inwardly from the median line of the buttonhole, then backward and as great a distance upon the other side of the median line, and then in a reverse direction to very nearly the position which it occupied during the stitching of the first straight side, when it is held stationary during the stitching of the second side and until the end of the buttonhole-slit is reached, when it is moved diagonally to the position it occupied at the beginning of the stitchin front elevation.

1 tion thereto.

ing operation and which causes additional stitches to be sewed inadvanc'in g order across the material beyond the end of the buttonhole-slit and over those first sewed until the last stitch taken practically covers or is in line with the first stitch taken. During the lateral movements of the clamps at the stitching of the eye the stitch-forming devices are rotated a half-revolution, the end of said half-revolution taking place at the beginning of the stitching of the last straight side, and they are held stationary during the said stitching of the last side and until after the making of the last barring-stitch, when they are released and permitted to return to their original position, as will hereinafter appear.

I will now proceed with a description of the drawings and with a detailed description of the construction and operation of the machine.

Figure 1 is a 'view of the machine in right side elevation. Fig. 2 is a view in left side elevation. Fig. 3 is a view in front elevation. Fig. at is a view in vertical central section taken lengthwise the machine. Fig. 5

is a view of the machine in plan inverted.

Fig. 6 is a viewin horizontal section upon the dotted line of Fig. 1. Fig. 7 is aviewin vertical cross-section upon the dotted line 7 70f Fig. 1. Fig. 8 is a detail view, in vertical section, of a portion of the mechanism for operating the cutting devices. Fig. 9 is a View in perspective of a portion of the belt-shifter and mechanism adjacent thereto. Fig. 10 is a detail view representing a part of the stopping mechanism of the stitches. Fig. 11 isa detail view of a section of the cam-wheel which operates the stitching-frame and the clamp-plate. Fig. 12 is a detail view representing the cutting mechanism. Fig. 13 is a detail view representing the starting mechanism. Fig. 14 is aviewin plan of a gear or wheel, showing part of the stopping mechanism of the cutter and a cam for turning back the stitching mechanism. Fig. 15 is a view Fig. 16 is a View in rear elevation, and Fig. 17 is a view in vertical section, of the devices for operating the lower needle and looper. Fig. 18is a view in perspective to further illustrate the manner of supporting and operating the looper. Fig. 19 is a View showing the relation of the buttonhole-cutter, bitttonhole-anvil, upper needle, and lower section of the stitch-forming devices at the end of the cutting operation, the view being taken from the side of the machine opposite that from which Fig. 12 was taken, and showing also the anvil, its support, and lower portion of the stitch-forming devices in vertical section. Fig. 20 is a detail view, enlarged, representing a portion of the rack for turning the under section of the stitch-forming devices and especially representing the shape of the teeth of the rack, whereby the pinion on said devices may be moved slightly from a vertical axis in rela- Figs. 21, 22, and 23 represent the mechanism for transferring laterally the clamp-plate and clamps at the end of the stitching operation and while the machine is coming to rest in order that it may be restored to the position which it should occupy at the beginning of the sewing of the next buttonhole in order. Figs. 24 and 24 are views, enlarged, of the portion of the cam-actuating clamp-plate and clamps and especially the part which is operative to transfer the clamp-plate and clamps for the purpose indicated in the description of Figs. 21, 22, and 23. Fig. 25 is aview in the form of a diagram of the said cam for providing the clamp-plate and clamps with their lateral movements; Fig. 26 is a view of'the clampplate removed from the machine. Fig. 27 is a detail view, enlarged, of the mechanism for shifting the belt and the stop mechanism, to which reference will hereinafter be made. Fig. 28is a view in side elevation of the frame of the machine, showing the upper or main section thereof and the lower bracket bolted thereto and also showing in dotted outline the bed upon which the frame is moved lengthwise it and the support for the front end of the bracket. Fig. 29 is a-view in perspective, enlarged,of the bu ttonhole-cutterlever removed from the machine. Fig. 30 is a view in perspective, enlarged, of one side of the clutch for operating the frame-feeding mechanism. Fig. 31 is a view in perspective, enlarged, of the opposite side of said clutch. Figs. 32, 33, 34, 35, and 35 are enlarged views, principally in plan, of the clamp-plate and its operatingcam for the purpose of representing the various positions of the clamp-plate from the beginning of the stitching of the buttonhole to the end of said stitching and in respect to a base-line which is the same in all the figures and which extends through the center of the pivot of said clam p-plate and the center of the lower needle, and in said views the lower needle is represented by a small solid circular section and the upper needle by a small cylindrical section. Fig. 32 represents the position of the clamp-plate and the buttonhole in respect to this base-line at the starting of the stitching of the half portion of the bar which is sewed at the first stitching operation of the machine, the clamp-plate being in the position in which it was left at the end of the operation of the machine after the stitching of the previous buttonhole and also being in the position in which the buttonhole-slit is cut by the buttonhole cutter and anvil, this position being slightly at one side of the base-line, and the buttonhole an vil and cutter are arranged to cut in a line slightly removed from the-base-line and upon a slight angle thereto. Fig. 33 represents the first stitches of half the bar as having been sewed and the clamp-plate as moved from the position represented in Fig. 32 to a position in which the base-line runs through the center of the buttonhole-slit lengthwise it. Fig. 34.- represents the position of the 

